Outdoor lighting need to withstand long-term snow and ice, wind and rain lightning test, and the higher cost, and because the use of more difficult to repair on the external walls, Outdoor LED Fixtures to meet the requirements of long-term stable work. The LED is a delicate semiconductor components, if damp, there will be chip moisture absorption, damage to the LED, PcB and other components, therefore, LED suitable for work in dry and low temperature. To ensure that the LED in the harsh outdoor conditions, long-term stable work, lighting waterproof structure design is critical.

At present, the lamp waterproofing technology is mainly divided into two directions: structural waterproof and waterproof material. The so-called structural waterproof, Outdoor LED Fixtures that is, in the product after the combination of structural components, already have a waterproof function. The material waterproof, it is the product design, leaving the potted plastic sealed electrical components of the location, assembly with glue material to achieve water.

After the wire insulation layer is cracked, Outdoor LED Fixtures the water vapor penetrates into the interior of the lamp through the gap of the wire core. After the lamp shell coating aging, the shell edge coating cracked or stripped, there will be gaps. After the plastic shell is aged, it will crack. Electronic potting colloid aging will produce cracking. Seal rubber tape aging deformation, there will be gaps. Structural adhesive between the adhesive aging, reduce the adhesion will appear after the gap. These are UV damage to the lamp waterproof capacity.

Based on the structure of waterproof design of the lamp, need to closely fit the silicone seal waterproof, shell structure is relatively sophisticated and complex, Outdoor LED Fixtures usually suitable for larger lamps, such as strip floodlights, square and circular cast light, etc., high power Lamps.

Structure of waterproof lamps only pure mechanical structure assembly, the use of simple tools, assembly processes and processes less, assembly cycle is short, the production line repair convenient. Lamps through electrical performance and waterproof test, you can package shipping, for short supply cycle of the project.

But the structure of the waterproof design of the lamp machining requirements are higher, the size of the parts to be precision with. Only the right materials and construction, Outdoor LED Fixtures in order to ensure its waterproof performance, the following design points.

(1) design silicone waterproof ring, select the appropriate hardness of the material, the design of the appropriate pressure, the cross-sectional shape is also very critical. Cable lead line is a water channel, need to choose waterproof wire, and the use of strong cable waterproof head (PG head), Outdoor LED Fixtures can prevent water vapor from the cable core gap in the penetration, but the premise is the wire insulation in the PG head long-term strong squeeze Do not crack down without cracking.

(2) At room temperature, the coefficient of linear expansion of the glass is about 7.2 × 10 ~ m / (m · K), and the aluminum alloy is about 23.2 × 10 1 m / (m · K). Lamps should be carefully considered when the larger size. Assuming that the lamp length is 1 000 mm, the daytime enclosure temperature is 60 ° C, the temperature of the rain or the night falls to 10 ° C and the temperature drops by 50 ° C. Outdoor LED Fixtures The glass and aluminum profiles shrink by 0.36 mm and 1.16 mm, respectively, with a relative displacement of O.8 mm , The sealing element in the repeated displacement process repeated pull, affecting air tightness.

(3) Many high-power outdoor LED lamps can be installed waterproof breathable valve (respirator) The use of respirator molecular sieve waterproof and breathable function, balance the inside and outside the lamp pressure, eliminate negative pressure, to prevent inhalation of water vapor, Outdoor LED Fixtures to ensure that the lamp interior dry. This cost-effective waterproof device, can improve the original structure of the waterproof design. But the respirator is not suitable for buried lights, underwater lights and other water often in the water.